Combustor Wall Aperture Deflector for Uniform Quench Mixing
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Solution Overview
Problem
Existing combustor walls in turbine engines do not promote a uniform pattern factor downstream of quench apertures, leading to variations in mixing and potential durability issues.
Innovation Solution
Incorporation of a wall deflector in the combustor wall structure to redirect airflow and influence vortex systems, thereby stabilizing the mixing pattern and reducing variations downstream of quench apertures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a conventional combustor wall structure is used, then the structure is simple, but the mixing pattern downstream of quench apertures is non-uniform
Solution Approach 1:
A wall deflector is introduced as an intermediary component between the quench aperture and the downstream flow path. This deflector redirects the jet flow from the quench aperture to create a more uniform mixing pattern downstream, acting as a mediator that modifies the flow characteristics without requiring complete structural redesign of the combustor wall
Solution Approach 2:
The wall deflector extends in the axial direction from the quench aperture, adding a dimensional element to the otherwise planar combustor wall structure. This axial extension allows the deflector to influence the downstream flow pattern by creating a three-dimensional flow redirection effect that promotes uniformity
2Temperature
If quench apertures are used for cooling, then cooling is achieved, but variations in mixing patterns occur downstream
Solution Approach 1:
The wall deflector serves as an intermediary that decouples the cooling function from the mixing uniformity problem. It allows the quench aperture to perform its cooling function while the deflector simultaneously modifies the downstream flow to achieve uniform mixing, resolving the contradiction between cooling effectiveness and mixing consistency
3Reliability
If no flow redirection is provided, then the structure is simple, but durability of components is reduced
Solution Approach 1:
The wall deflector is a relatively simple intermediary component that provides flow redirection to improve durability. By introducing this single element, the system achieves better component durability through more uniform mixing and reduced thermal stress variations, without requiring complex structural modifications
Solution Approach 2:
The wall deflector changes the flow parameters (direction, velocity distribution) downstream of the quench aperture. This parameter modification leads to more uniform mixing patterns and improved thermal field distribution, thereby enhancing the durability of combustion and turbine section components
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The wall deflector enhances the durability of combustion and turbine section components by reducing variations in mixing patterns and cooling requirements.
Implementation Method 1
redirect airflow and influence vortex systems
Implementation Method 2
redirect airflow
Data Source
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AI summary
An apparatus is provided for a turbine engine (20). This turbine engine (20) apparatus includes a combustor wall (74), and the combustor wall (74) includes a panel (86), a deflector (106) and a quench aperture (72) that extends along an aperture centerline (138) through the combustor wall (74) to an aperture outlet (152) into a combustion chamber (58). The panel (86) extends axially along and circumferentially about an axis (22). The panel (86) extends radially between a first panel side (118) and a second panel side (120). The first panel side (118) forms a peripheral boundary of the combustion chamber (58). The panel (86) forms a downstream side (158) of the aperture outlet (152) at the first panel side (118). The deflector (106) projects out from the panel (86) at the first panel side (118) into the combustion chamber (58). The deflector (106) forms an upstream side (156) of the aperture outlet (152).